Traceback (most recent call last):
File "C:\Users\11111\Desktop\python\爬取豆瓣电影TOP250.py", line 15, in
res=requests.get(url=url,headers=headers,proxies=proxies,timeout=30,)
File "D:\python\lib\site-packages\requests\api.py", line 75, in get
return request('get', url, params=params, **kwargs)
File "D:\python\lib\site-packages\requests\api.py", line 61, in request
return session.request(method=method, url=url, **kwargs)
File "D:\python\lib\site-packages\requests\sessions.py", line 542, in request
resp = self.send(prep, **send_kwargs)
File "D:\python\lib\site-packages\requests\sessions.py", line 655, in send
r = adapter.send(request, **kwargs)
File "D:\python\lib\site-packages\requests\adapters.py", line 510, in send
raise ProxyError(e, request=request)
requests.exceptions.ProxyError: HTTPSConnectionPool(host='movie.douban.com', port=443): Max retries exceeded with url: /top250 (Caused by ProxyError('Cannot connect to proxy.', OSError('Tunnel connection failed: 503 Service Temporarily Unavailable')))
把你的代码用代码段</>的文本形式发一下，我们才能知道原因，好为你解答。
是连接不上代理，代理不可用，更换可用代理，或将proxies=proxies去掉。同时在循环中加上time.sleep(2),减少频率，不要过于频繁请求。
代理不能用或者本地ip被封了